Sliding rooflights for Belfast: the essentials
Sliding rooflights in Belfast means box rooflights whose glass lid slides back for walk-out roof access. We cover the BT1 district and the rest of County Antrim, with a survey before any price is fixed.
Conservation areas and listed buildings in Northern Ireland are excluded from householder permitted development, so we check before quoting. Sliding rooflights suit walk-out access where a hatch would feel cramped.
We cover all of Belfast and the BT1 district, and nearby Castlereagh and Newtownabbey.
Options we can specify in Belfast
- Double or triple glazing
- Integrated balustrade on some ranges
- Electric drive with safety edge
- Box (glazed sides) or flat sliding lid
- Anthracite, black or RAL frames
- Glazed box sides keep the headroom open
- Lockable from inside
Before you order: points to check
- The stair opening and headroom must meet Building Regulations
- Weight and point loads need a structural check
Do you need permission in Belfast?
In Northern Ireland, roof alterations come under Class B of the 2015 order: a rooflight facing a road must not project more than 15 cm and must sit at least 0.5 m from the ridge, eaves, verge and party wall. Listed buildings also need listed building consent from the council.
Technical Booklet F1 (2022) asks for replacement windows and rooflights in existing homes to reach WER Band C or a U-value of 1.6 W/m²K, assessed in the vertical position. Extensions follow a 25% glazing allowance in Technical Booklet F1.
Our planning guide covers each nation in more detail.
Guide prices for Belfast
Prices below are shown including and excluding VAT. In Belfast, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large box slider with electric drive | £11,995 – £20,395 | £9,995 – £16,995 |
| Standard box slider Typical | £8,995 – £13,195 | £7,495 – £10,995 |
| Flat sliding lid | £7,195 – £9,595 | £5,995 – £7,995 |
What happens next
- Tell us what you have. Send the BT1 postcode, a rough size and a couple of photos.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Neighbouring towns
More we do in Belfast
Common questions
What if it is raining?
Fitted with a rain sensor, an electric unit closes automatically. Most also have a manual override for power cuts.
Is it lockable?
Yes. Units lock from inside and the drive holds the lid closed.
How heavy is it?
Box sliders weigh hundreds of kilograms, so delivery may need a crane or lifting gear, and the structure must be checked.
Do I need to be at home for the survey in Belfast?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
How do I book a survey in Belfast?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
